Premium
Nonlinear Dynamics in the Tokamak Edge
Author(s) -
Scott B.D.,
Kendl A.,
Ribeiro T.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201010039
Subject(s) - tokamak , turbulence , physics , nonlinear system , scaling , magnetohydrodynamics , statistical physics , plasma , mesoscale meteorology , mechanics , classical mechanics , nuclear physics , quantum mechanics , meteorology , mathematics , geometry
The nonlinear character of the tokamak edge results from a unique combination of parameters, leading to a wide dynamical range for most processes. The energetically consistent gyrokinetic equilibrium is emphasised. Edge turbulence computed gyrokinetically exhibits energetic contact to mesoscale MHD and does not follow linear scaling. Gyrofluid studies show self consistent profiles, currents and flows which are kicked out of equilibrium to varying degree. L‐mode turbulence and ELM crash phenomenology are both examples of energetic contact between turbulence and MHD, with opposite causality. The overall equilibrium is a statistical saturation rather than a state to which the plasma dissipatively converges (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)